Journal
ANTIOXIDANTS
Volume 10, Issue 11, Pages -Publisher
MDPI
DOI: 10.3390/antiox10111644
Keywords
flavonoids; depression; antioxidants; oxidative stress; diet; mental health
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The latest evidence suggests that dietary flavonoids have a significant effect on improving symptoms of depression, with higher intake of flavonoids potentially beneficial for alleviating depressive symptoms. Further research is needed to clarify the causal and mechanistic links, as well as confirm the functional brain changes associated with flavonoid consumption.
Recent evidence suggests that diet modifies key biological factors associated with the development of depression. It has been suggested that this could be due to the high flavonoid content commonly found in many plant foods, beverages and dietary supplements. Our aim was to conduct a systematic review to evaluate the effects of dietary flavonoids on the symptoms of depression. A total of 46 studies met the eligibility criteria. Of these, 36 were intervention trials and 10 were observational studies. A meta-analysis of 36 clinical trials involving a total of 2788 participants was performed. The results showed a statistically significant effect of flavonoids on depressive symptoms (mean difference = -1.65; 95% C.I., -2.54, -0.77; p < 0.01). Five of the 10 observational studies included in the systematic review reported significant results, suggesting that a higher flavonoid intake may improve symptoms of depression. Further studies are urgently required to elucidate whether causal and mechanistic links exist, along with substantiation of functional brain changes associated with flavonoid consumption.
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